NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

7 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, last 30 days — NPA 509
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 3
NEW CINGULAR WIRELESS PCS, LLC 2
EXIANT COMMUNICATIONS LLC 2
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2016-09-26 509-903-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F LIBERTY LK WA
2016-09-23 509-596-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F CLARKSTON WA
2016-09-23 509-596-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F CLARKSTON WA
2016-09-23 509-596-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F CLARKSTON WA
2016-09-16 509-559-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CHENEY WA
2016-09-16 509-565-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MEDICAL LK WA
2016-09-16 509-581-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KENNEWICK WA
2016-09-14 509-537-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 PASCO WA
2016-09-14 509-579-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 KENNEWICK WA
2016-09-14 509-730-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 WALLAWALLA WA
2016-09-14 509-940-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 RICHLAND WA
2016-09-13 509-932-3XXX 3000–3999Assigned UNITED STATES CELLULAR - WA 6270 MATTAWA WA
2016-08-30 509-960-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E SPOKANE WA
2016-08-09 509-960-9XXX 9000–9999Assigned INTRADO COMMUNICATIONS, LLC 841C SPOKANE WA
2016-08-02 509-913-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OTHELLO WA
2016-08-01 509-558-3XXX 3000–3999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 SPOKANE WA
2016-08-01 509-558-4XXX 4000–4999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 SPOKANE WA
2016-08-01 509-558-5XXX 5000–5999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 SPOKANE WA
2016-08-01 509-558-6XXX 6000–6999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 SPOKANE WA
2016-07-26 509-515-4XXX 4000–4999Assigned UNITED STATES CELLULAR - WA 6270 SUNNYSIDE WA
2016-07-19 509-643-9XXX 9000–9999Assigned UNITED STATES CELLULAR - WA 6270 SUNNYSIDE WA
2016-07-13 509-563-0XXX 0000–0999Assigned ONVOY, LLC - WA 483E COLVILLE WA
2016-07-06 509-584-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WAPATO WA
2016-06-29 509-580-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SELAH WA
2016-06-27 509-537-8XXX 8000–8999Assigned METROPCS, INC. 5562 PASCO WA
2016-06-27 509-537-9XXX 9000–9999Assigned METROPCS, INC. 5562 PASCO WA
2016-06-24 509-581-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KENNEWICK WA
2016-06-23 509-902-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F YAKIMA WA
2016-06-22 509-316-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F PASCO WA
2016-06-22 509-608-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E SPOKANE WA
2016-06-21 509-289-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EPHRATA WA
2016-06-21 509-902-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 YAKIMA WA
2016-06-20 509-699-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 WENATCHEE WA
2016-06-20 509-820-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 KENNEWICK WA
2016-06-20 509-820-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 KENNEWICK WA
2016-06-17 509-730-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 WALLAWALLA WA
2016-06-14 509-212-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 KENNEWICK WA
2016-06-14 509-608-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 SPOKANE WA
2016-06-14 509-608-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 SPOKANE WA
2016-06-14 509-964-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2016-06-10 509-907-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 YAKIMA WA
2016-06-07 509-902-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K YAKIMA WA
2016-06-06 509-738-9XXX 9000–9999Assigned CHARTER IP ENABLED SERVICES, LLC 792K KETTLE FLS WA
2016-06-01 509-685-7XXX 7000–7999Assigned CHARTER IP ENABLED SERVICES, LLC 792K COLVILLE WA
2016-05-31 509-498-0XXX 0000–0999Assigned METROPCS, INC. 5562 CHENEY WA
2016-05-27 509-578-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RICHLAND WA
2016-05-06 509-676-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WALLAWALLA WA
2016-05-06 509-740-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OMAK WA
2016-05-06 509-978-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 NESPELEM WA
2016-05-04 509-608-0XXX 0000–0999Assigned METROPCS, INC. 5562 SPOKANE WA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.